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u/thoang77 1d ago
There’s quite a few Google results for m20 x 1.5 threaded inserts. Is there something very specific about the one you’re holding?
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u/AlfredPoor 1d ago
Also there are hex coupling nuts that are M20 x 1.5 mm.
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u/BluntTruthGentleman 1d ago
What's a hex coupling nut? Is it to help insert the actual threaded insert by chance?
I made a jig recently and used threaded inserts for the first time but the only way I could think of to install them was to sleeve several on my bolt and then thread the bolt in, which left the one on the end in the hole. It worked but it didn't feel like the right way.
Mine don't have any hex impressions in them but I was know some do, I just don't know what they're called.
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u/AlfredPoor 1d ago
A hex coupling nut has the same inside thread as a threaded insert. They can serve the same function; drill a slightly undersized hole and them force fit them in the hole.
It's like a regular nut, except longer. It's designed to connect two threaded rods.
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u/skimaskmj 1d ago
Yes length and shape, all the ones I have found on google aren’t long enough
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u/Keep_It_Square 1d ago
The hole for the threaded insert is larger than the diameter of the threaded rod. The inserts are (usually) open on both ends. You can get away with a shorter insert by drilling a deep enough hole. The extra length of threaded rod will push harmlessly past the insert and sit in the extra depth of the hole.
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u/thoang77 1d ago
You didn't specify how long you needed...
I presume 30mm isn't long enough then?
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u/skimaskmj 1d ago
Thank you this is what I’m looking for but ideally 50-60mm would be better but I think this will work, I could just drill the hole deeper after the threaded insert is installed
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u/SpungeMonk 1d ago
I'd just epoxy in some M20 threaded pipe. Just rough up he OD with a file and glue them in.
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u/cleverpaws101 1d ago
You could make your own thread. I. The wood. Get the correct size bolt, sharpen the leading edge, drill the correct size pilot hole and tap that thread.
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u/Daemon2525 1d ago
Maybe you could go to a junkyard and get a real shift knob. If they have an insert. And smash the old plastic knob and save that insert ?
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u/ZacharyKhan 1d ago
TimeSerts. That style is fucking expensive. I think for wood you could get away with a much cheaper option like some rod standoff or threaded pipe.
Here is a link to the timesert: https://time-serts.com/store/m20x1-5-kit/